Fluid delivery gun



vr. s. Fi'AAsT Nov. I7, 1942.

FLUID DELIvERY GUN Filed Juiy 22. 1959 wm. mm

l//CTOE 5. 51,457)

ENTOR.

Patented Nov. 17, 1942 [-,UNITED STTES ''LN' `QFFICE 1 rhum DELIVERY GUNV' Victor S.. Faast, Santa Paula, Calif. Applicants July 22, 1039,serial No. 286,041 v (crei-73) 4 Claims.

rhis invention relatesv to a iiuid delivery gun intended principallyforinjecting liquid into wood or other. materials, but also capable ofbeing lused for a variety of other purposes. f j :An important objectofythe invention is `to providea gun of the kind stated which is adapted tobe used for the purpose of rapidly impregnating the timbers of abuilding with an insecticide fatal to the varioustypes of termites whichfrequently injure Wooden building structures. The improved character ofthe article for accomplishing this purpose is clue to the provision of asuperior nozzle structure to prevent the backow of the liquid chemicalinjected into the timbers bythe nozzle; f to the provision of a Ynozzlestructure capable of being rapidly and eiectively hammered into itsoperative position inrelation to the timber to be impregnated with theliquid insecticide; and to the provision of an improved means forgraduating the delivery of the liquid from the nozzle.y

Other objects and advantages of the invention reside in the provision ofan implement whereby the timbers of a. building may be more'rapidly andeiciently impregnated with a' liquid insecticide; the provision of adevice which is less tiresome for the workman to use; and the provisionof a device whereby the liquid insecticide ma be used in a less wastefulmanner. f

Another important object ofthe invention' is to provide an improvedvalve cracking means which will permit the impregnating agent to attimes drool from the nozzle tip of the instrument.

' Still another object of the invention resides in providing a novelcombination of nozzle, tip, hammer head, Hand adjustable valve deliverymeans'with a tank containing a liquid under Pressure. l l I An improvedfeature of thev invention resides in the combination, witha nozzlehaving a tapered tip' at Oneextremity and an impact receiving portion atits other extremity to drive said tip into a body to be impregnated withliquid from the nozzle; ofV a `flexible conduit connection for supplyingliquid under pressure to rsaid nozzle, the iiexibility of saidconnection allowing the device to accommodate itself to the vibrationsresulting from delivering blows against its aforesaid imp-act receivingportion.

`The invention further includes an improved means for sealing a blindbore in a Wooden or other body and then forcing an impregnatingliquidinto such sealed bore.

Other objects, advantages,- and features of Ainvention will hereinafterappear.

Referringlto the drawing wherein is shown-a preferred embodiment as now.reduced to practice .and .being introduced to the trade,

Fig; 1 is a view showing the complete device in side elevation, someparts being lbroken away to show'interior construction. In said view, indotted lines, the valve is shown in cracked or open position.

Fig. 2 is an enlarged section oi the nozzle tip occupying its operativeposition in relation to a piece of Wood under treatment. rIhe tip of thevalvel in the latter view is shown partly in section to reveal its innerconstruction.

Referring in detailto `the drawing, the device comprises a gun lincluding a valve 2, anozzle 3 fastenedto animp-act receivingY head 4against which blows may be struck to drive the nozzle into the wood, incombination with a tank Elfo'r delivering an agent (iY under pressurethrough the hose l to the wooden timber 3 for impregnation.

' Thenofzzle 3 includes" a tip 9, provided with a longitudinalrestricted aperture H3, which is 'securely vfastened in the end lofthenozzle', the tip and adjacent portion of Vthe nozzle being tapered tofacilitate driving these parts into the blind hole il, the nozzle havingin a spaced relation to its Vtipped end a circumferentially extendingbead'iz, 'which forms with the wood afle'ak 'proof joint, even while theagent being delivered is under impregnating pressure;

Describing in furtherA detail the structures which have'beenl mentioned,the'valve '2 is rof the pointed, conicaltype and is contained within atubular casing M having-within it la; valve charnber'l 5 furnishedwith'anoutlet passage l6,'slightly beveled at its inner end to form aseat for the valve 2.

i Said valve 2 is carried by an operatingstem l1 working through astullng box i8 one end of which has a screw-threaded connection 'withthe valve casing, its opposite end portion being `'externally screwthreaded and having screwed on to it a cylindrical, milled nut 9, saidnut not only serving to keep in placethe stuiiing-box sleeve 2 l, butalso, by means of its diametrically reduced outer end portion 22,affording an adjustable stop means for the'valve operating lever 23. Acoiled compression spring 24 tends to hold the valve 2 against its seat.

The valve casing I4 is carried by a combined support and tubular conduitmember 25 of an L shape, the short limb 2B of the Ll connecting the bodyportion of said support with said Valve casing, the parts 25, 2B, and I4being desirably made integral. The tubular member 25 extends in aparallel spaced relation to the part of the casing I4 which is furnishedwith the stuing box I8. Said member 25 has a laterally extendingapertured lug 21 with which the valve operating arm 23 is connected bymeans of a pivot 28, said arm being shown provided with a bifurcatedextension 29 which straddles said lug 21 and is likewise apertured toreceive the pivot 28.

The extension 29 of said arm projects laterally from a head or widenedend portion 3l thereof, said widened portion having through it an openedpassage 32. Said passage affords a clearance around the back end portionof the valve stem II, which projects thereinto. Through the head 3| ofthe lever 23 and the passage 32 thereof, extends the valve operating pin33, said pin also passing through a diametrical hole 34 providedtherefor in the back end portion of said valve stem II. This hole is ofa considerably greater diameter than the pin 33, thus allowing asuiicient play for the pin to avoid obstructing the operation of the arm23 which would otherwise result on account of the arcuate movement ofsaid pin in relation to the reciprocatory valve stem.

By preference and as shown. communication between the hose 'I and thetubular member 25 is afforded by means of a metal coupling member 35,the front end of which has a screw-threaded connection 36 with the backend of the member 25 and the opposite end of which is connected with thehose by means of a conventional connection 31.4 Said member 35constitutes an extension of the tubular support 25 and, in conjunctionwith the valve lever 23, completes the handle portion of the device.

The impact receiving member 4 is connected with a tubular shank 4| whichis coupled onto the valve casing I4 by means of an expanded internallythreaded coupler 42. It is to be understood that the parts 42, 4I, 4 and3 constitute continuous conduit means for conducting fluid from theinterior of the valve casing to the nozzle tip 9.

Referring to certain details of construction, the

attached nozzle tip 9 is shown having a diametrically reduced shankportion 9a which is wedged in the terminal portion of the main nozzleportion 3 and provides an annular shoulder 9b against which the end ofsaid nozzle abuts.

In the operation of the device lfor the purpose of impregnating woodwith a liquid to destroy termites, a series of blind bores are rstdrilled into the timbers to be treated, said holes being bored at leastto a depth sufficient to admit the tip portion of the nozzle to thedepth shown in Fig. 2 where the bead I2 thereof is located somewhatbelow the top of the bore and space is left for a liquid receivingchamber below the extremity to the nozzle after it has been driven intosaid bore the proper distance. Y

Then, after a small portion of the extremity of the nozzle has beeninserted into the mouth portion of the bore, the impact receiving headwill be struck one or more times with a hammer, thus driving the nozzleinto the fully inserted position shown in Fig. 2, wherein the bead I2will form a seal which will prevent back flow of the liquid whensupplied from the reservoir under a pressure desirably between 150 and200 pounds per square inch. The bead should be made beveled or rounded,as shown, to lessen obstruction to forcing it down to the sealingposition.

The tubular coupling member 35 forms a rearward extension of the mainlimb of the support 25 and thus qualifies said support, in conjunctionwith the valve operating lever 23, to form an eilicient handle means forthe device. Said lever may be readily depressed by one part; of the handwhile another part of the hand abuts against the side of the part 35opposite thereto. It is only necessary to depress the lever for a briefinterval to supply from the nozzle a suilicient quantity of the liquidchemical to impregnate the wood adjacent to each bore II.

A powerful valve spring 24 is provided in order to safeguard againstleakage past the valve seat of the pressure impelled liquid.

Hence, unless some provision were made to automatically maintain thevalve slightly open, said powerful spring would make it tiresome for theoperator to manually maintain the valve in a cracked or slightly openposition for any considerable length of time, as is necessary when thedevice is used to drool a thin stream of the liquid over woodensurfaces, this method of treatment being sometimes desirable, and it isrendered more effective by the combination of the accurately adjustablevalve controlling nut I9 with the leak preventing nozzle bead I2. Butwhen this operation is to be performed, the operator will, while holdingthe valve lever 23 slightly depressed with one hand, use the other handto adjust the nut I9 to the proper position for stopping the outwardswing of lever 23 before the valve reaches its closed position. Thiswill cause a small stream of the poisoned liquid to iiow continuouslyfrom the nozzle. 'I'he provision of the flexible hose 'I as a part ofthe conduit means imparts to the device the desired freeness of movementrequired for its operation in both the ways which have been described.

It should be understood that the present disclosure is for the purposeof illustration only and that this invention includes all modificationsand equivalents which fall within the scope of the subject matterclaimed.

What is claimed is:

1. In a device of the kind described, a combined support, handle meansand conduit means; a tubular valve casing carried by said support, avalve in said casing, said valve having an operating stem, a leverconnected with said stem to operate said valve, a spring tending to movesaid valve to its seat, said valve casing having a stuffing box whichforms an extension thereof and is furnished with a packing through whichsaid valve stem operates, a tubular nut screwed to said stuffing boxthrough which the stem of said valve extends, said nut having an outerend portion abutting the head of said lever, said nut being adjustableon said stuing box to limit the movements of said lever which accompanythe approach of said valve toward its closed position and therebyregulate the flow of fluid through said valve.

2. In a device of the kind described, a combined support and conduitmember having a laterally directed end portion, a tubular valve casingcommunicating with and carried by said end portion, an end portion ofsaid valve casing extending in a parallel spaced relation to saidconduit member, such portion of said valve casing carrying a stuffingbox, a valve Within said valve casing to control the flow of fluidtherethrough, said valve having a stem which extends through saidstuffing box and projects therefrom parallel to said conduit member,there being a diametrical hole through such projecting portion of saidvalve stem, a lever to operate said valve, said lever having a headthrough which extends a cylindrical passage that surrounds in a spacedrelation the projecting end portion of said valve stem, said headcarrying a pin which extends across said passage and also passes throughsaid hole through said valve stem, said pin being of considerably lessdiameter than said hole, said lever having a lateral extension which ispvotally connected with the rst recited support and conduit portion, aspring tending to move said valve to Vits seat, and a tubular nutscrewed to said stuffing box through Which the stem of said valveloosely extends, said nut having a reduced outer end portion abuttingthe head of said lever, said nut being adjustable on said stuffing boxto limit the movements of said lever which accompany the approach oisaid valve toward its closed position and thereby regulate the ilow ofiluid through said valve.

3. In a device of the kind described, a support for a nozzle including aconduit to supply liquid to the nozzle, one section of said conduitconstituting handle means for holding the nozzle, said conduit sectionhaving an ciset portion which is furnished with a valve for saidconduit, Said valve having a stem in a parallel spaced relation to saidconduit section, and an operating lever for said valve stem, said leverextending in an adjacent generally parallel relation to said handle tobe graspable in one hand together therewith, and a turnable controlmeans for said valve, said turnable control means comprising a tubularnut screwed to said offset portion through Which the stem of said valveloosely extends, said nut having an outer end portion abutting the headof said lever, said nut being adjustable to limit the movements of saidlever which accompany the approach of said valve toward its closedposition and thereby regulate the ilovv ci fluid through said valve.

4. The combination with a liquid pressure supply means and a nozzlemember provided at one end with a uid delivery tip having acircumferential bead extending therearound and at its opposite end withan extension suited to receive blows from a hammer directed thereagainstina direction to force said nozzletip and head into a Woody body adaptedfor impregnation by a liquid from said pressure supply means, said beadsealing against back ow the liquid ejected from said nozzle into saidbody; of a manually operable valve controlled fluid gun to regulate theilow of liquid from said pressure supply means to said nozzle tip, saidgun having a fluid delivery 'end in communication with and providing asupport for said nozzle member, said gun further comprising a tubularvalve casing communicating with said delivery end, a combined supportand conduit member connected to said pressure supply means and having alaterally directed end portion connected to and communicating with saidtubular valve casing; an end portion of said valve casing extending in aparallel spaced relation to said conduit member, such portion of saidvalve casing carrying a stufling box, a valve within said valve casing,said valve having a, stem which extends through said stuiing box andprojects therefrom parallel to said conduit member, there being adiametrical hole through such projecting portion of said valve stem, alever to operate said valve, said lever having a head through whichextends a tubular passage that surrounds the projecting end portion ofsaid valve stem in a spaced relation thereto to provide for tiltingmovements of said lever, said head carrying a pin Which extends acrosssaid passage and also passes through said hole through said valve stem,said pin being of considerably less diameter than said hole, said leverhaving a lateral extension which is pivotally connected With saidconduit member, a spring tending to move said valve to its seat, and atubular nut screwed to said stufling box through which the stem of saidValve loosely extends, said nut having a reduced outer end portionabutting the head of said lever, said nut being adjustable on saidstuiling box to limit the movements of 'said lever which accompany theapproach of said valve toward its closed position and thereby regulatethe iloW of uid through said valve.

VICTORl S. FAAST.

